Fusion code

#! /bin/bash

files=(*.txt)

for ((i=0; i<${#files[@]}; i++)) ; do
    file="${files[$i]}"
    awk -f f.awk "$file" > "${file}.mod"
done

 f.awk is:
{
    gsub(/\([^)]*\)/,"&; printf&")
    print
}

input.txt:

x=7;
sqrt(x+5*4); sqrt(x*x); 
i=3;
a=2+sqrt(8);

Running: awk -f f.awk input.txt gives:
x=7;
sqrt(x+5*4); printf(x+5*4); sqrt(x*x); printf(x*x); 
i=3;
a=2+sqrt(8); printf(8);

This wont work for nested parenthesis, like sqrt(4+2*(x+y))
Running: awk -f f.awk input.txt>>output.txt writes it to output file

Paraview Client Server model

We can't use the binaries for this model. Paraview has to be compiled on the server.
Following should be installed along.
1. cmake : cross platform build tool. CMake is used to control the software compilation process using simple platform and compiler independent configuration files. CMake generates native makefiles and workspaces that can be used in the compiler environment
2. Qt
http://qt-project.org/downloads

QT installation..
Goto INSTALL file in the downloaded unzipped tar file.
Look at the html for embedded Linux
http://qt-project.org/doc/qt-4.8/qt-embedded-install.html

cd  ~/qt-everywhere-opensource-src-4.8.5
 ./configure -embedded

make

now set the path in (your home directory) ~/.bash_profile

PATH=/usr/local/Trolltech/QtEmbedded-4.8.5/bin:$PATH
 export PATH

also set cmake path 

ParaView uses Qt as its GUI library. Qt is required whenever the ParaView client is built.
set qt path>>
export PATH=/home/umunipala/research/sem4/source/qt/qt-everywhere-opensource-src-4.8.5/bin:$PATH

 file and source:: give the executables

export QT_QMAKE_EXECUTABLE=/home/umunipala/research/sem4/source/qt/qt-everywhere-opensource-src-4.8.5
Need to set this as environment variable
  and run paraview : try qt installation and then set env variables. Then try the following...

/home/umunipala/research/sem4/source/ParaView-v4.0.1-source/CMake  is the location to run this command

1. Run ccmake to configure the Makefiles

%

ccmake ../ParaView-v4.0.1-source

-----------------------------------------------------------------------------------------------------------------------------------------------------
3.MPI
4.Python
5 Mesa 3d graphics library
http://www.mesa3d.org/download.html
ftp://ftp.freedesktop.org/pub/mesa/9.0.1/

Cmake

There doesn't seem to be a 64 bit. Going to use Linux i386
http://www.cmake.org/cmake/resources/software.html
Installation location : /home/umunipala/research/sem4/source/cmake (binaries)

Source installation location:
/home/umunipala/research/sem4/source/cmake/cmakesource/cmake-2.8.12.1

steps:

>> ./bootstrap

>> make

>>make install

-- Install configuration: ""
CMake Error at cmake_install.cmake:36 (FILE):
  file cannot create directory: /usr/local/doc/cmake-2.8.  Maybe need
  administrative privileges. :(

Lets try the binary.
Maybe we need to add the bin to the path.

export PATH=/home/umunipala/research/sem4/source/cmake/cmake-2.8.12.1-Linux-i386/bin:$PATH

configuration of client with server:
https://www.alcf.anl.gov/user-guides/vis-paraview-data-analytics-cluster

AWK and shell scripting

Advanced Bash-Scripting Guide
Bash Programming docs

How to reset lost password in Ubuntu / Linux

Power on your Ubuntu computer while holding down the Shift Key on your keyboard. At the boot menu (GRUB) select (Recovery Mode)

Then scroll down to root and press Enter.

Next, run the commands below to remount root

mount -rw -o remount /

run the commands below to create / change your password.

passwd username

Exit and login with your new password